Lace attachment



July 30, 1935. w. HElNlTz 2,009,925

LACE ATTACHMENT Filed Oct. l5, 1934 5 Sheets-Sheet l v .77 i@ Y y July30, 1935. w. HElNlTz LACE ATTACHMENT Filed Oct. 13, 1954 5 Sheets-Sheet5 ffy.

I 7 l @i 4 W/V//j 117% 225i f /7//6/7/0/'1 //laefrmr www July 30, 1935.w. HElNlTz 2,009,925

LACE ATTACHMENT Filed Oct. 15, 1934 5 Sheets-Sheet 4 @Mw/5%@ i July 30,1935. w. HEINITZ 2,009,925

LACE ATTACHMENT Filed Oct. 15. 19,34v 5 Sheets-Sheet 5 Patented July 30,1935 PATENTv OFFICE LACE ATTACHMENT Waldemar Heinitz, Chemnitz, Germany,assignor to Schubert & Salzer Maschinenfabrik Aktiengesellschaft,Chemnitz, Germany Application October 13,

1934, serial No. 748,234

In Germany October 14, 1933 2 Claims.

The present invention relates to a jacquard attachment for moving thepattern sinkers (pattern needles) whichin flat knitting machines servefor making jacquard press patterns as well as 5 jacquard lace patterns.The two kinds of patternings may be made in a fabric either each foritself or both together.

Hitherto jacquard press patterns are obtained in at knitting machines bysingly movable press 10 sinkers actuated or lifted by a jacquardattachment, while jacquard lace patterns are made by singly movableblind points actuated or lifted by the jacquard attachment. 4

This method requires separated double jacquard l5 cards. appertainingdouble lifting bars and separated eccentrics, i. e. two completejacquard attachments, one for the jacquard press patterning and one forthe jacquard lace patterning.

To obtain press patternings it has also been 1'0 proposed to cause thesingly movable blind points which for the purpose of jacquard lacepatternings actuate the petinet tickler, to actuate as auxiliary needlesthe frame needles also. In carrying out this method the auxiliaryneedles are lifted upwardly either in a patterning or in a nonpatterningsense.

If for the purpose of obtaining lace patternings and ress patterningsthe auxiliary needles are lifted upwardly in a patterning sense, theloops 30 are damaged during the manufacture of lace patternngs, whilethe manufacture of press patternings has the disadvantage, that changesof position of the needle heads are caused by the bending of theknitting needles which results in :2.3 the formation of verticallystriped goods and thread distortions at the needle head.

If for both kinds of patterning the auxiliary needles are shiftedupwardly in a non-patterning sense, a change between the number of thebent needles and the non-bent needles causes the formation of stripedgoods during the manufacture of lace patternings, While during presspatternings pressing is eiected in an eye. This equals to a worn outpress resulting in needle ruptures. Moreover the knock over jacks arealso caused to project too far from their normal position.

A further disadvantage during patterning in a non-patterning sense is,that all the non-pat- .-o terning needles are shifted upwardly, wherebythe lifting bar, actuating the great number of draw-sinkers, theeccentrics and associated'levers are overloaded.

If, however, shifting upwardly in different sense is effected for bothkinds of patterning, i. e. for

lace patterning in a non-patterning sense and for .press patterning in apatterning sense, the jacquard card for one of the two patterning kinds,in the present case the jacquard card 'for press patternings, wouldlreceive a multiple of the perforations and in any case a far too greatnumv ber of perforations which under all circumstances is to be regardedas a drawback.- In the manufacture of lace patternings, moreover, thedisadvantage of overloading the lifting bars etc., mentioned above asoccurring during patterning in a non-patterning sense, also is to beexpected.

If in performing the well known upward movement of the needles a singlejacquard cycle and a single jacquard cylinder only are to be used, theemployment 'of jacquard sinkers in the jacquard attachment becomesnecessary which are provided with several projections acted upon byseveral lifting bars. Such lifting bars further necessitate severalgroups of eccentrics as always one lifting bar only acts upon thesinkers.

It has further already been proposed to use the singly movable presssinkers for obtaining lace patternings also, the side of the presssinkers situated opposite the press point serving as blind point for thepetinet tickler.

In carrying out this method an actuation of the singly movable presssinkers during a change between a patterning and a non-patterning senseis effected in such a manner, that for press patternings during theformation of tuck loops, i. e. loops which are not pressed, the presssinkers are lifted and thereby moved out of the range of the knittingneedle head. To obtain lace patternings, such press sinkers are liftedlat the knitting needles of which the loops are not to be transferred.These press sinkers thereby intercept the petinet tickler. The presssinkers at which pressing is effected, i. e. at which normal vloops areformed, as Well as the press sinkers at the. knitting needles of whichthe loops are to be transferred, remain in the lower position of rest.

For carrying out this further well known upward movement of the sinkersalso the use of draw sinkers provided with several projections wasnecessary upon which also several lifting bars .were caused to act.

The object of the invention is to obviate all these disadvantages and toallow the manufacture of tuck loops and lace loops in the simplestpossible manner in a single jacquard cycle and with a single lifting baronly by altering the direction of movement of the pattern sinkers insuch a manner, that in the formation of press patternings as well aslace patternings the pattern sinkers, occupying their starting position,i. e. for both pattern sinkers the position suitable for forming plainloops, are selected to be moved downwardly in a patterning sense. Thatis to say, in the formation of press patternings, pressing is effectedin the starting position and in the formation of lace patternings thepetinet tickler is intercepted. From the starting position the presspattern sinkers at which pressing is not to be effected are, for thepurpose of forming press patternings, now moved downwardly. whereas inthe formation of lace patternings the lace pattern sinkers at theknitting needles of' which transfer is to be effected are moveddownwardly. If in this operation the press pattern sinkers and the lacepattern sinkers are moved downwardly simultaneously with the knittingneedles, i. e. if the sinkers and needles are moved together in the samedirection and with the lsame speed, it is warranted, that on lowering ofthe knitting needles for the purpose of landing or knocking over thehooks of these needles do not abut against the upper edge of the loweredpattern sinkers selected, whereby damage of the points of the knittingneedles is prevented.

In the manufacture of press patternings considerable time is saved asthe pattern sinkers moving downwardly may already b e selected duringthe sinking of the loops. If in a known manner the pattern sinkers aremoved upwardly, selecting of the sinkers during sinking of the loops isnot possible as then the thread would be sunk around these needlesselected for upward movement. One eccentric only is hereby required forthe lifting movements of the rollers and lifting bars of the jacquardattachment for the formation of press patternings Vand lace patternings.

Without departing from the spirit of the invention, both pattern sinkerscould, for instance, be combined to a single pattern sinker. For thepurpose of making press patternings as well as lace patternings itwould, in such a case, only be necessary to always move this patternsinker in the sense stated above, i. e. in a patterning sensedownwardly.

- In the accompanying drawings some devices for carrying the inventioninto effect are shown by way of example.

In these' drawings:

Figs. 1-4 illustrate the positions of the parts duringfthe severaloperations.

Fig. 1 is a sectional view of the parts of a flat knittingmachinenecessary for carrying the invention into effect and showing these partsin the pressing position during the formation of normal loops.

Fig. 2 is a sectional view similar to Fig. 1, showing the several partsin the non-pressing position during the formation of tuck loops.

Fig. 31s a sectional view similar to Fig. 1, showing the parts effectingno transfer lduring the formation of normal loops.

Fig. 4 is a sectional view similar to Fig. 1, showing the partseffecting transfer during the formation of lace loops.

Figs. 5-7 show broken away portions of the pattern sinkers on a largerscale.

Figs. 5 and 6 illustrate a side view and a rear view in the direction ofthe arrow :c respectively of the heads of the pattern sinkers.

Fig. 'I shows a side view of a middle portion.

Fig. 8 isa section on line 8-8 o'f Fig. '1 on a still larger scale andFigs. 9 and 10 illustrate two modified constructions of the patternsinkers.

In slots of a bearing block I pattern sinkers 2 for press patterningsand pattern sinkers 3 for lace patternings are arranged in overlappingposition. The bearing block I is, in a well known manner, supported byarms 6 arranged upon the shaft 5 and connected to the bearing block I bymeans of a pivot 4. Draw sinkers 1 having an inclined surface 8 areshiftably arranged in the lower part of the bearing block -I.

The pattern sinkers 2 and 3 carry hook-like projections 9 and I0respectively to which springs II are connected the other ends of whichengage hooks fixed to the b earing block I. By this means the sinkersare drawn downwardly and rest upon the draw sinkers 1. The projections 9of the pattern sinkers 2 for press patternings are bent laterally andpass along the pattern sinkers 3 for lace patternings (see'Fig. 8). Theprojections I0 of the sinkers 3 are preferably staggered with regard tothe projections 9 so that the springs II do not come into contact witheach other (Fig. '1), as is well known.

Connected to the draw sinkers 1 are draw wires I2 carrying the jacquardsinkers I3 the nibs I4 of which may be influe'.-ced by a lifting bar I5which is reciprocated in a well known manner. According to theconstruction illustrated, this lifting bar I5 is provided at a bellcranklever I6 actuated by an eccentric I1.

The heads I8 of the press sinkers 2 lie in front of the pressing edge ofthe sinker head I9. Behind the heads of the press sinkers 2 the heads 20of the pattern sinkers 3 are arranged which preferably are, as shown inFigs. 5 and 6, provided with a groove or eye 2l at the side directedtowards the pressing edge. 22 are the jack sinkers, 23 the knock overjacks, 24 the knitting needles and 25 the petinet tickler.

In Fig. 1 the parts of the device are shown in the position for themanufacture of plainl fabric. The draw sinkers 1 are at rest. Thepattern sinkers 2 and 3 resting upon the draw sinkers 1 are maintainedin the starting position necessary for the formation of plain loops inwhich the heads I8 and 20 lie in front of the pressing edge of thesinker head I9. During the formation of the loops, the heads of knittingneedles are pressed, so that all loops are knocked over.

I'f press patternings are to be made, the jacquardy attachment causesthe corresponding draw sinkers 1 to be moved in the direction of thearrow Z (Fig. 2) to the left. Hereby the pattern sinkers 2 resting uponthe draw sinkers 1 are moved downwardly along the inclined surface 8under the action of their springs II, so thatl the heads I8 lie belowthe pressing edge of the sinker head I9 (Fig. 2). The needles arrangedat these places are now, during the loop formation, prevented from beingpressed, so that tuck loops are formed in a well known manner.

For the manufacture of lace patternslthe bearing block I is, in a wellknown manner, raised by an upward swinging movement of the arms 6.

'By the pattern sinkers occupying the starting position the head 20 ofthe pattern sinker 3 comes into the path of the petinet tickler 25 whichhereby is prevented from transferring (Fig. 3).

If transfer is to be eiected, the corresponding draw sinkers 1 are, Iasin the case of pressing, drawn forward by the jacquard attachment sothat, ,as already described, the pattern sinkers 2 are lowered. Theheads I8 of the pattern sinkers 2 come out of reach of the petinettickler 25, so that now the lace transfer may be carried out.

From the four positions illustrated, it is to be seen, that with thepattern sinkers 2 in the starting position knitting is effected in anonpatterning sense in both positions of the bearing block I (Figs. 1and 3). With the bearing block I in the normal position, the head I8 ofthe pattern sinkers 2 presses away the needle head 24 and with thebearing block I lifted in the usual manner the head 20 of the.patternsinker 3 retains the petinet tickler 25.

If draw sinkers 1 are shifted, whereby the pattern sinkers 2, 3 arelowered from their starting position, knitting is effected in apatterning sense, so that with they bearing block I in the normalposition, tuck loops are formed, (Fig. 2), whereas lace loops are madewith the bearing block I lifted in the usual manner (Fig. 4).

For both patterning kinds the pattern sinkers 2, 3 .are lowered.Therefore no special movements of the draw sinkers 1 are required whichin both cases are moved in the same direction. This movement, therefore,may be effected by the same jacquard attachment.

As the pattern sinkers 2, 3 have the same direction of movement, theymay, as shown in Fig. 9, be provided with projections 26, 21 which areengaged by a projection 28 carried by a special member 29 and pressedupon the draw sinkers 1 under the action cf a spring 30.

It would also be possible to completely combine the two sinkers 2, 3 inwhich case, as shown in Fig. 10, the upper end of this sinker is formedat the one side as a pressing head I8' and at the other side as aretaining means 2 I for the petinet tickler.

What I claim is:

1. In a jacquard attachment for moving pattern sinkers in ilat knittingmachines, press pattern sinkers having a head at the side facing the'knitting needles, lace pattern sinkers arranged in overlapping positionwith said press pattern sinkers and having a groove at the side removedfrom the knitting needles, and draw sinkers each having an inclinedsurface for guiding downwardly both kinds of pattern sinkers during thedisplacement of said draw sinkers.

2. In a jacquard attachment for moving pattern sinkers in flat knittingmachines, overlapping press pattern sinkers and lace pattern sinkers,draw sinkers and a member controlled by said draw sinkers acting uponsaid overlapping pattern sinkers during their downward movement.

WOLDEMAR HEINITZ.

